The PVDS table is used to define the properties of a solvent for a range of different temperature and pressures. See example below, where data is given for only one temperature:
PVDS DATA_UNITS PRESSURE Bar FVF m^3/m^3 VISCOSITY cP END DATA TEMPERATURE 15.0 1.013529 0.9357635 0.0080 18.250422 0.0678972 0.0096 35.487314 0.0352259 0.0112 69.961099 0.0179498 0.0140 138.908669 0.0090619 0.0189 173.382454 0.0072653 0.0208 200.00 0.0063404 0.0223 207.856239 0.0060674 0.0228 276.803809 0.0045534 0.0268 345.751379 0.0036439 0.0309 621.541659 0.0021672 0.0470 END !end TEMP block END !end DATA END !end PVDS
The PVDS data may contain several different pressure tables, one for each temperature. In the pressure table, column 1 is the pressure, column 2 is the solvent formation volume factor (\(B_v\)), column 3 is the solvent viscosity (\(\mu_g\)).
The pressure in column 1 must increase monotonically, and the pressure tables must be ordered for increasing temperatures. The number of pressure points given for each temperature must be the same, however the values and range of the pressure can vary. Temperature and pressure outside the given range are extrapolated. When pressure data are available for only one temperature, the properties are considered isothermal.
The default units used by this table are:
Bar for the pressure,
\(m^3/m^3\) for \(B_s\)
\(cP\) (centipoise) for the viscosity
C for temperature.
DATA_UNITS specifies units different than the default values, and include only the properties (in any order) for which units are needed. The temperatures can currently be entered only in degree Celsius.